394564991712 has 48 divisors (see below), whose sum is σ = 1036231337232. Its totient is φ = 131458396160.

The previous prime is 394564991699. The next prime is 394564991713. The reversal of 394564991712 is 217199465493.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394564991713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 787743 + ... + 1187294.

It is an arithmetic number, because the mean of its divisors is an integer number (21588152859).

Almost surely, 2^394564991712 is an apocalyptic number.

394564991712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

394564991712 is an abundant number, since it is smaller than the sum of its proper divisors (641666345520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394564991712 is a wasteful number, since it uses less digits than its factorization.

394564991712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977131 (or 1977123 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 60.

The spelling of 394564991712 in words is "three hundred ninety-four billion, five hundred sixty-four million, nine hundred ninety-one thousand, seven hundred twelve".